package org.example;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @Author: 以默
 * @Date: 2024/7/29 17:18
 */
//@Order(0)//优先级
@Component
public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.获取请求参数
        ServerHttpRequest request = exchange.getRequest();
        MultiValueMap<String, String> params = request.getQueryParams();
        //2.获取参数中的authorization参数
        String auth = params.getFirst("authorization");
        if ("admin".equals(auth)){
            // 3.判断参数值是否等于admin
            return chain.filter(exchange);
        }//4.如果参数值不等于admin，则拦截
        //4.1 设置状态码
        exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
        //4.2 拦截请求
        return exchange.getResponse().setComplete();
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
